Title:
OPTICAL WAVEGUIDE ELEMENT
Document Type and Number:
Japanese Patent JPH01238626
Kind Code:
A
Abstract:
PURPOSE:To obtain the optical waveguide element which can stop down an exit beam to a small spot even if many external lenses are not used by parting the light exit end face of an optical waveguide from a substrate end face, then forming the substrate end face as a lens face. CONSTITUTION:The light exit end face 11b of the optical waveguide 11 formed on the transparent substrate 16 is positioned apart from the end face 16a of the substrate 16 toward the inner side and the end face 16a of the substrate 16 opposite to the light exit end face 11b constitutes the lens face having a curvature within the plane parallel with the optical waveguide 11. The guided light 13 progressing in the optical waveguide 11 is once emitted from the light exit end face 11b to the part of the substrate 16 and is emitted from the substrate end face 16a to the outside of the substrate. Since the light exit end face 11b of the optical waveguide 11 is apart from the substrate end face 16a, the spreading angle of the light beam 13B decreases and since the substrate end face 16a constitutes the lens face, the light beam 13B is condensed also in the direction perpendicular to the direction of the condensed light by a cylindrical lens 25 by which the beam is focused finally to a small spot P.
Inventors:
SUNAKAWA HIROSHI
Application Number:
JP6673388A
Publication Date:
September 22, 1989
Filing Date:
March 19, 1988
Export Citation:
Assignee:
FUJI PHOTO FILM CO LTD
International Classes:
G02B6/122; G02B6/12; G02F1/33; G02F1/335; (IPC1-7): G02B6/12; G02F1/33
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)